And it came to pass, when David was come to Mahanaim, that Shobi the son of Nahash of Rabbah of the children of Ammon, and Machir the son of Ammiel of Lodebar, and Barzillai the Gileadite of Rogelim,

Wesley's Notes

17:27 Shobi - Who, as it may seem, disliked and disowned that barbarous action to the ambassadors; and therefore, when the rest were destroyed, was left king or governor of the residue of the Ammonites. Machir - See above chap.9:4.

Jamieson-Fausset-Brown Bible Commentary

27-29. when David was come to Mahanaim-The necessities of the king and his followers were hospitably ministered to by three chiefs, whose generous loyalty is recorded with honor in the sacred narrative.

Shobi-must have been a brother of Hanun. Disapproving, probably, of that young king's outrage upon the Israelite ambassadors, he had been made governor of Ammon by David on the conquest of that country.

Machir-(See 2Sa 9:4). Supposed by some to have been a brother of Bath-sheba, and

Barzillai-a wealthy old grandee, whose great age and infirmities made his loyal devotion to the distressed monarch peculiarly affecting. The supplies they brought, which (besides beds for the weary) consisted of the staple produce of their rich lands and pastures, may be classified as follows: eatables-wheat, barley, flour, beans, lentils, sheep, and cheese; drinkables-"honey and butter" or cream, which, being mixed together, form a thin, diluted beverage, light, cool, and refreshing. Being considered a luxurious refreshment (So 4:11), the supply of it shows the high respect that was paid to David by his loyal and faithful subjects at Mahanaim.

Matthew Henry's Concise Commentary

17:22-29 Ahithophel hanged himself for vexation that his counsel was not followed. That will break a proud man's heart which will not break a humble man's sleep. He thought himself in danger, concluding, that, because his counsel was not followed, Absalom's cause would fail; and to prevent a possible public execution, he does justice upon himself. Thus the breath is stopped, and the head laid low, from which nothing could be expected but mischief. Absalom chased his father. But observe how God sometimes makes up to his people that comfort from strangers, which they are disappointed of in their own families. Our King needs not our help; but he assures us, that what we do for the least of his brethren, who are sick, poor, and destitute, shall be accepted and recompensed as if done to himself